Frequencies for first 10,000 rows of prov3425 variable in pos1997 dataset :

       srv: |
dental-onsi |
te-resident |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,410       74.10       74.10
          N |        507        5.07       79.17
          Y |      2,083       20.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016